Locomotive-boiler.



No. 682,437. Patented Sept. H], mm. c. VANDERBILT.

LOCOMOTIVE BOILER.

(Application filed May 22, 1901.} (No Modgl.)

2 Sheets-Sheet 2.

UNITED STATES CORNELIUS VANDERBILT, OF NEW YORK, N. Y.

LOCOMOTIVE-BOILER.

SPECIFICATION forming part of Letters Patent No. 682,437, datedSeptember 10, 1901.

Application filed May 22, 1901.

T0 ctZZ whom it may concern.-

Belt known that LCORNELIUS VANDERBILT, of the borough of Manhattan, inthe city, county,and State of New York, have invented certain new anduseful Improvements in L0- comotive-l3oile'rs, of which the following isa specification, reference being had to the accompanyingdrawings,forming a part hereof.

This invention relates to locomotive-boilers of the general type of thatshown and describedin Letters Patent of the United States No. 637,186,dated November 14:, 1899; and the object of the invention is to furtherimprove lhe construction of boilers of the type shown in said LettersPatent, and particularly to avoid the danger of leakage at the joints ofthe boiler-shell occasioned by unequal expansion and contraction of theparts, while avoiding unnecessary weight, saving valuable space in thecab, and retaining desirable generating surface and steam-space.

To attain these desirable results in one struc-v ture, the main fire-boxsection,the forward or barrel section, and the middle conical sectionare arranged symmetrically with respect to the common axis, and the rearportion of the fire-box section is reduced ortapered to a head which isof larger diameter than the cylindrical fire-box, and, furthermore, thefluesheet is inclined from the vertical, so that it shall stand at rightangles to the inclined tubes.

The invention will be more fully described hereinafter with reference tothe accom pan ying drawings, in which Figure 1 is a view in longitudinalcentral section of the improved boiler. Fig. 2 is a rear end elevationthereof, the ends of the tubes not being shown. Fig. 3 is a view intransverse section on the plane indicated by the line 3 3 of Fig. 1.

As represented in the drawings, Fig. 1, the forward or barrel section Aof the boiler is cylindrical and is connected by a truncated conicalmiddle section B with the main firebox section 0, which is alsocylindrical and is of greater diameter than the forward or barrelsection A. These three sections of the boiler shell, as will be observedby refer- Serial No. 61,352. (No model.)

i once to Fig. l, are severally symmetrical with respect to the commonaxis of the boiler, whereby unequal expansion and contraction at thejoints between the several sections are avoided, and consequentlyleakage at such joints is also avoided. The rear portion D of thefire-box section is tapered or reduced in diameter to afford additionalroom within the cab and to avoid unnecessary weight,the extreme end ofsuch portion D being secured in the usual manner to a head E, which isof greater diameter than the cylindrical fire-box F. If this portion ofthe fire-box section were reduced to the diameter of the fire-box, notonly would desirable generating-surface be lost, since the water-levelwithin the boiler is necessarily higher than the top of the fire-box,but valuable steam-space above the waterlevel would also be sacrificed.The connection of the tapered portion of the fire-box section D to thehead E avoids the objections just advantages above referred to. Thefire-box F is preferably cylindrical in cross-section and is disposedeccentrically within the fire-box section 0 of the boiler. The rearfine-sheet G and the forward flue-sheet H are setat a slight angle fromthe vertical, so that the inclined tubes I may be secured to saidfine-sheets at right angles thereto, thereby avoiding danger of leakageat the joints between the tubes and the flue-sheets.

The advantages derived from the improved construction have been pointedoutabove and will require no further explanation herein.

I claim as my invention- 1. A locomotive-boiler having a cylindricalforward section, a truncated conical middle section and a cylindricalfire-box section all symmetrically disposed with relation to the commonaxis, substantiallyas shown and described.

2. A locomotive-boiler having a cylindrical forward section, a truncatedconical middle section and a cylindrical fire-box section allsymmetrically disposed with relation to the common axis, a reduced ortapered rear portion of the fire-box section and a rear head to whichsaid reduced portion is secured, said mentioned and at the same timesecures the y head having a greater diameter than the firesaid tubes,substantially as shown and debox, substantially as shown and described.i scribed. 1o

A locomotive-boiler having a cylindrical This specification signed andwitnessed this forward section, a truncated conical middle 14th day ofMay, A. D. 1901.

section and a cylindrical fire-box section all CORNELIUS VANDERBILT.

symmetrically disposed with relation to the In presence of-- commonaxis, inclined tubes and front and EDWIN O. FARLOW,

rear flue-sheets disposed at right angles to L. A. SHEPARD.

